Run beyond your limits. Effektor Trail Running Powershirt®. You run at maximum speed. Your pulse rate is right in the target zone. Your performance is outstanding. It’s just one of those moments when everything is perfect. Soon you’ll find these moments are commonplace. The Effektor Trail Running Powershirt® delivers perfect performance conditions for your whole torso using performance-enhancing X-BIONIC® Partialkompression®. This also enhances the return flow of blood to the veins in your arms and relieves your circulation. The large, patented 3D Bionic Sphere® system also improves the power in your chest and back. It cools you when you sweat and warms you when you’re cold – delivering maximum assistance to your body’s own sweat management.